Will anyone hate me for making my fobs out of 1" nylon and generic claps?

Absolutely not. This is as friendly a community as you'll find (besides a couple bad apples.) Anytime you can get decently close to accurate without breaking the bank AND by hand-making your layout is a success.

I had a similar idea to make attaching and removing the hose from the sewed on connector using a magnet glued into the connector and a barrel magnet glued into the end of the hose. Your solution looks good to me.

It's a common misconception that you can't wash the suit with a hose connector sewn on - just make sure that you use some strong coat thread to sew it on, and be certain to turn the suit inside out when you wash it. For added strength, you can sew a small vinyl patch behind the connector on the inside of the suit. I've been using this method for almost a decade on numerous suits and have never had an issue.

It just seems like a lot of folks tend to over-engineer the hose connector by resorting to magnets, industrial adhesives, and interlocking components.